A data link control protocol developed by ISO in response to IBM’s SDLC protocol, which is a subset of HDLC. CCITT defined a different subset of HDLC (see LAP) as the second (data link) layer of the X25 protocol.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。